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All Journal AQUATIC SCIENCE & MANAGEMENT e-Journal BUDIDAYA PERAIRAN JURNAL ILMIAH PLATAX JURNAL PERIKANAN DAN KELAUTAN TROPIS
Adnan Wantasen
Fakultas Perikanan Dan Ilmu Kelautan Universitas Sam Ratulangi
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Environmental Science

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Biometrics and Reproduction of Redbelly Yellowtail fusilier Caesio cuning (Bloch, 1791) in Guraping Bay, Halmahera Island, Indonesia Marsaoly, Rafil; Bataragoa, Nego; Rondonuwu, Ari B.; Wantasen, Adnan S.; Rembet, Unstain; Lalita, Jans
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.49322

Abstract

This study aims to analyze the biometrics of yellowtail fish (length-weight relationship, growth patterns, condition factors, length-fecundity relationship) and reproductive aspects (gonadal maturity level, gonadal maturity index, and fecundity). The yellowtail fish sample used in this study was taken from fishermen's catches in April 2023. A total of 73 male individuals 17.0-29.9 cm total length, 62.00-356.00 gram, 77 female individuals 17.5-8 .1 cm total length, weight 69.88-288.00 grams. Male length-weight relationship W= 0.0140L2.9662 R2= 0.9812, isometric growth pattern. Female W= 0.0166L2.9104, R2 = 0.9633, growth pattern isometric. Condition factor 1.00 ± 0.06 for males and 1.00 ± 0.07 for females. Gonadal maturity levels I, II, III, IV and V for both males and females with the number of individuals at TKG I 65, II 26, III 25, IV 24, and V 10 individuals. The gonadal maturity index with the highest average value was 1.08 ± 0.47 at TKG IV. Fecundity ranged from 1.771-68.425 which was calculated on 28 fish samples with a mean ± SD of 20.158 ± 19.110. Biometric relationship with fecundity F = 102.67L0.1955, R² = 0.0789 shows a very weak relationship between length and fecundity. Keywords: Length-weight, condition factor, maturity, gonad index, fecundity. Abstrak Penelitian ini bertujuan untuk menganalisis biometrik  ikan ekor kuning (hubungan panjang-berat, pola pertumbuhan, faktor kondisi, hubungan panjang-fekunditas)   dan aspek reproduksi (tingkat  kematangan gonad, indeks kematangan gonad, dan fekunditas). Sampel ikan ekor kuning yang digunakan dalam penelitian ini diambil dari tangkapan nelayan pada bulan April 2023. Sebanyak 73 individu jantan 17,0-29,9 cm panjang total, 62,00-356,00 gram, 77 individu betina   17,5-8,1 cm panjang total, berat  69,88-288,00 gram.   Hubungan panjang-berat jantan W= 0,0140 L 2,9662 R2= 0,9812, pola pertumbuhan isometrik. Betina W= 0,0166L2,9104, R2 = 0,9633, pola pertumbuhan isometrik. Fakotor kondisi 1,00±0,06 untuk jantan dan betina 1,00±0,07. Tingkat kematangan gonad I, II, III, IV dan V baik jantan maupun betina dengan jumlah  individu pada TKG I  65, II 26, III 25,  IV 24, dan V 10 individu.  Indeks kematangan gonad dengan nilai rata-rata tertinggi yaitu 1,08±0,47 pada TKG IV. Fekunditas berkisar pada  1.771-68.425 yang dihitung pada 28 sampel ikan dengan rata-rata ± SD  20.158 ±19.110. Hubungan biometrik  dengan fekunditas F = 102,67L0,1955, R² = 0,0789 menunjukkan hubungan yang sangat lemah antara panjang dan fekunditas. Kata Kunci: Panjang-berat, faktor kondisi, kematangan gonad indeks, fekunditas.
Structure of the Seagrass Community, In Poopoh Beach Waters, Tombariri District, Minahasa Regency, North Sulawesi Province Mamonto, Riswanto; Kondoy, Khiristin Ivone Fisye; Wantasen, Adnan S.; Kepel, Rene Charles; Pratasik, Silvester Beny; Menajang, Febry Susana Ivone
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.49599

Abstract

Seagrass are flowering plants (Angiosperms) that are fully adapted to life immersed in the sea. This plant consists of rhizomes, leaves and roots, (Rhizomes are stems that sink and creep horizontally, leave and flower, and grow roots). It is these rhizomes and roots that hold back the waves and currents on seagrass plants. The purpose of this study was to determine seagrass species, species density, relative density, species frequency, relative frequency, species closure, relative closure, important value index, diversity index, domination index and aquatic environmental conditions. There are 4 species of seagrass found in the waters of Poopoh Beach, namely, Thalassia hemprichii, Enhalus acoroides, Halodule pinifolia, Halophila ovalis. The number of stands of seagrass species in the study area ranged from 53-965 individuals, species density (17.67-321.67) individuals/m2, relative density (3.98-72.61%), frequency (0.045-0.90), relative frequency (3.57-71.42%), species closure (0.41-7.31), relative coverage (1.04-78.12%), seagrass importance value index in Poopoh Beach waters shows that Thalassia hemprchii has the highest importance value index among the other 3 seagrass species namely (212.85%), diversity index (0.97), species dominance index (0.11-0.44%/m²). Environmental conditions in the waters of Poopoh Beach, which has a temperature range of 38°C, a salinity of 35‰, has a substrate of sand, sand mixed with mud, muddy and coral fragments. Keywords: Poopoh Beach, Seagrass, Community Structure. Abstrak Lamun adalah tumbuhan berbunga (Angiospermae) yang sepenuhnya menyesuaikan diri dengan hidup terbenam dalam laut. Tumbuhan ini terdiri dari rhizoma, daun dan akar, (Rhizoma adalah batang yang terbenam dan merayap secara mendatar, berdaun dan berbunga, serta tumbuh akar). Rhizoma dan akar inilah yang menahan hempasan ombak dan arus pada tumbuhan lamun. Tujuan penelitian ini adalah untuk mengetahui jenis-jenis lamun,  kerapatan spesies, kerapatan relatif, frekuensi jenis, frekuensi relatif, penutupan jenis, penutupan relatif, indeks nilai penting, indeks keanekaragaman, indeks dominasi dan kondisi lingkungan perairan. Spesies lamun yang ditemukan diperairan Pantai Poopoh berjumlah 4 spesies yaitu, Thalassia hemprichii, Enhalus acoroides, Halodule pinifolia, Halophila ovalis. Jumlah tegakan spesies lamun dilokasi penelitian berkisar dari 53-965 individu, kerapatan spesies (17,67-321,67) individu/m2, kerapatan relatif (3,98-72,61%), frekuensi (0,045-0,90), frekuensi relatif (3,57-71,42%), penutupan jenis (0,41-7,31), penutupan relatif (1,04-78,12%), indeks nilai penting lamun diperairan Pantai Poopoh menunjukkan bahwa Thalassia hemprchii memiliki indeks nilai penting paling tinggi diantara ke 3 spesies lamun lainnya yakni (212,85%), indeks keanekaragaman (0,97), indeks dominasi spesies (0,11-0,44%/m²). Kondisi Lingkungan diperairan Pantai Poopoh yakni mamiliki kisaran suhu 28°C, salinitas 30‰, memiliki substrat pasir, pasir campur lumpur, berlumpur dan patahan karang. Kata Kunci: Pantai Poopoh, Lamun, Struktur Komunitas.
Direct Benefit Value Of Coral Reefs Ecosystem in Bahoi Village West Likupang District North Minahasa Regency Kindangen, Rezky G. T. L; Sangari, Joudy R. R.; Wantasen, Adnan S.; Rembet, Unstain N. W. J.; Mandagi, Stephanus V.; Kambey, Alex D.
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.50086

Abstract

The high use of coastal resources especially coral reefs by the people of Bahoi Village can affect the existing ecosystem. This research was conducted in July 2021 in Bahoi Village, West Likupang District, North Minahasa Regency designed to determine the value of direct benefits of the coral reefs ecosystem at the location. The data collected in this study were primary and secondary data. Primary data were obtained by conducting interviews among the fishermen as respondents. The interview was conducted using the purposive sampling method by taking a sample of 30 respondents from fishermen's households in the community. As for secondary data, namely the ecological condition of coral reefs (coral cover), the general condition and population of Bahoi Village were based on YAPEKA 2015 data. The data collected were then tabulated and analyzed using the effect on production (EOP) model to determine the value of the direct benefits of coral reefs. The main livelihood of the people of Bahoi Village is fishermen, which is comprised of 107 people (60% of the total number of households in Bahoi Village. The results show that the community of Bahoi is very dependent on the coastal resources. Based on the result of the EOP analysis technique used the value of direct use benefits obtained from coral reef fisheries is Rp. 379,746,378,-/ha/year. Keywords: Direct benefits, ecosystem value, Coral reefs Abstrak Tingginya pemanfaatan pesisir khususnya terumbu karang oleh masyarakat Desa Bahoi dapat mempengaruhi sumber daya ekosistem yang ada. Penelitian ini dilaksanakan pada bulan Juli 2021 di Desa Bahoi, Kecamatan Likupang Barat, Kabupaten Minahasa Utara dengan tujuan untuk mengetahui nilai manfaat langsung ekosistem terumbu karang di lokasi tersebut. Sumber data yang dikumpulkan dalam penelitian ini menggunakan data primer dan data sekunder. Data primer didapatkan dari hasil wawancara. Wawancara yang dilakukan menggunakan metode purposive sampling dengan mengambil sampel responden sebanyak 30 orang. Sedangkan untuk data sekunder yaitu kondisi ekologi terumbu karang (tutupan karang) Desa Bahoi, Gambaran umum Desa Bahoi dan jumlah penduduk Desa Bahoi. Data yang dikumpulkan selanjutnya dibuat tabulasi dan dilakukan analisis untuk menentukan nilai manfaat langsung dari terumbu karang yang ada di Desa Bahoi. Mata pencaharian utama masyarakat Desa Bahoi adalah nelayan yaitu sebanyak 107 orang (60% dari total jumlah kepala keluarga Desa Bahoi). Dimana menunjukkan bahwa masyarakat Desa Bahoi sangat bergantung pada hasil perairan di Desa Bahoi. Berdasarkan hasil analisis dengan pendekatan EOP, diperoleh nilai manfaat langsung yang didapatkan dari pemanfaatan terumbu karang sebagai perikanan tangkap di Desa Bahoi yaitu sebesar  Rp. 379.746.378,-/ha/tahun. Kata kunci: Manfaat langsung, Nilai, Terumbu karang
The Fish Community Of The Tondano River Estuary In Manado City: Dei, Katrin Dowena; Rondonuwu, Ari B.; Wantasen, Adnan S.; Mandagi, Stephanus; Mantiri, Rose O. S. E.; Kambey, Alex D.
Jurnal Ilmiah Platax Vol. 12 No. 1 (2024): ISSUE JANUARY-JUNE 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i1.54156

Abstract

This study was conducted to determine the relative abundance, species composition, relative abundance, and structure of fish communities. The data collection method used was the “Swept area” method. Sampling was conducted twice. The first sampling was conducted on June 17, 2023, and the second sampling was conducted on July 4, 2023, at the Tondano River estuary. Data collection was conducted at low tide. The data analysis used was relative abundance, diversity index, evenness index, and dominance index. The results of this study showed that the fish species composition in the Tondano River estuary consisted of 15 families, 15 genera, and 18 species with a total of 288 individuals. Between the two observed months, June and July, the number of species was higher in June. Based on the data analysis, the highest relative abundance in the Tondano River estuary was in the June phase, namely the Ambassis urotaenia species with a value of 31.5%. The diversity of fish species in the June and July phases was classified as quite high, considering the relatively high evenness index and low dominance index. Keywords: Tondano River Estuary, Relative Abundance, Diversity Index. Abstrak Penelitian ini dilakukan dengan tujuan untuk mengetahui kelimpahan relatif, komposisi spesies ikan, kelimpahan relatif dan struktur komunitas ikan. Metode pengambilan data ikan menggunakan metode metode “Swept area”. Pengambilan sampel dilakukan sebanyak 2 kali. Pengambilan sampel pertama dilakukan pada bulan juni tanggal 17 juni 2023 dan pengambilan sampel kedua dilakukan pada bulan juli tanggal 4 juli 2023 yang berlokasi di Muara Sungai Tondano. Pengambilan data dilakukan pada waktu surut. Analisis data yang digunakan adalah kelimpahan relatif, indeks keanekaragaman, indeks kemerataan, dan indeks dominansi. Hasil penelitian ini menunjukkan komposisi jenis ikan di Muara Sungai Tondano terdiri 15 famili, 15 genus dan 18 spesies dengan total 288 individu. Diantara kedua fase bulan yang diamati, yaitu bulan Juni dan bulan Juli, jumlah spesies lebih banyak ditemukan pada Juni. Berdasarkan hasil analisis data kelimpahan relatif tertinggi di Muara Sungai Tondano ada pada fase Juni yaitu spesies Ambassis urotaenia dengan nilai 31.5 %. Keanekaragaman jenis ikan pada fase bulan Juni dan Juli tergolong cukup tinggi dengan memperhatikan indeks kemerataan yang cukup tinggi dan indeks dominansi yang rendah. Kata kunci: Muara Sungai Tondano, Kelimpahan Relatif, Indeks Keanekaragaman.
Land Suitability and Carrying Capacity Analysis Of The Mangrove Ecotourism At Sarawet Village, East Likupang District, North Minahasa Regency Tangkudung, Maureen J. N. N.; Schaduw, Joshian N. W.; Sondak, Calvyn F.A.; Wantasen, Adnan S.; Sumilat, Deiske A.; Rondonuwu, Arie B.; Luasunaung, Alfrets
Jurnal Ilmiah Platax Vol. 12 No. 2 (2024): ISSUE JULY-DECEMBER 2024
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v12i2.57781

Abstract

The coastal area of Sarawet Village, East Likupang District, North Minahasa Regency, North Sulawesi Province has a mangrove forest covering an area of 379 hectares. Apart from being a living habitat for marine biota, this large area of mangrove is also an ecotourism destination. The purpose of this research is to determine the suitability of mangrove lands as ecotourism areas; Determine the ecological carrying capacity of the area for mangrove ecotourism activities; Assess public perceptions regarding the benefits of mangrove ecosystems and their potential to be developed as ecotourism destinations. The research method is a survey describing ecological, socioeconomic, institutional, and infrastructure conditions. Data collection is grouped into primary data and secondary data. Primary data collection was carried out through direct observation in the field by measuring the ecological potential of mangroves, visual observation of biota, and information from the community obtained directly at the research location through structured interviews with respondents. Based on the results of the study, the Tourism Suitability Index (IKW) value for the Sarawet Village mangroves was 2.73, which indicates the Very Suitable category for being developed as a mangrove river ecotourism area, as well as the public's perception of the benefits of the mangrove ecosystem and its potential to be developed as an ecotourism destination is very good. so it is hoped that this can improve the welfare of the existing community. Keywords: Mangroves, Ecotourism, Sarawet Abstrak Kawasan pesisir Desa Sarawet Kecamatan Likupang Timur Kabupaten Minahasa Utara Provinsi Sulawesi Utara memiliki hutan mangrove seluas 379 hektar, keberadaan mangrove yang luas ini selain menjadi habitat hidup bagi biota laut juga sebagai tujuan ekowisata. Tujuan dan manfaat penelitian ini adalah menentukan kesesuaian lahan mangrove sebagai kawasan ekowisata; Menentukan daya dukung ekologis kawasan untuk kegiatan wisata mangrove ekowisata; Mengkaji persepsi masyarakat tentang manfaat ekosistem mangrove dan potensinya untuk dikembangkan sebagai tujuan ekowisata. Metode penelitian yang digunakan yaitu melakukan survei untuk mendeskripsikan kondisi ekologi, sosial ekonomi, kelembagaan dan infrastruktur. Pengumpulan data dikelompokkan menjadi data primer dan data sekunder. Pengumpulan data primer dilaksanakan melalui pengamatan langsung di lapangan dengan melakukan pengukuran potensi ekologi mangrove, pengamatan biota secara visual dan informasi dari masyarakat diperoleh langsung di lokasi penelitian melalui wawancara secara terstruktur dengan responden. Berdasarkan hasil kajian diperoleh nilai Indeks Kesesuaian Wisata (IKW) mangrove Desa Sarawet yakni sebesar 2,73 yang menunjukkan kategori Sangat Sesuai untuk dapat dikembangkan sebagai Kawasan ekowisata sungai mangrove, serta persepsi masyarakat tentang manfaat ekosistem mangrove dan potensinya untuk dikembangkan sebagai tujuan ekowisata adalah sangat baik sehingga diharapkan hal tersebut dapat meningkatkan kesejahteraan masyarakat yang ada. Kata Kunci : Mangrove, Ekowisata, Sarawet
Community Structure of Macroalgae in the Coastal Waters of Bahowo Tamara, Giovanni Matthew A. J.; Kepel, Rene Charles; Lumingas, Lawrence J. L.; Wantasen, Adnan S.; Lasabuda, Ridwan; Lohoo, Anneke V.
Jurnal Ilmiah PLATAX Vol. 13 No. 2 (2025): ISSUE JULY-DECEMBER 2025
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v13i2.61576

Abstract

This research aims to describe the morphology and anatomy of each species from the research location and to analyze the community structure of macroalgae from the research location. Data collection was done using the Line Transect method with a quadrat sampling technique during the lowest tide. Temperature and salinity checks were measured using a thermometer and refractometer. Substrate determination was done visually based on the type of substrate. The results of this study found 9 species, consisting of 4 red algae species (Rhodophyceae) and 5 green algae species (Ulvophyceae). The morphology of these algae species varies, with different anatomy based on transverse and longitudinal sections of each part of the alga's thallus. The highest species density was H. edulis, while the lowest densities were A. fragilissima, D. versluysii, T. fragilis, and C. racemosa. The macroalgae diversity index values in the three transects are in the medium category, the species evenness index values are stable, the species richness index values are in the low category, and the dominance index values are in the low category. Keywords: Macroalgae, Community, Transect, Quadrat, Bahowo.   Abstrak Tujuan penelitian ini adalah mendeskripsikan morfologi dan anatomi masing-masing spesies dari lokasi penelitian, dan menganalisis struktur komunitas makroalga dari lokasi penelitian. Pengambilan data menggunakan metode Line Transect dengan teknik sampling kuadrat yang dilakukan pada saat surut terendah. Pengecekan suhu dan salinitas diukur dengan menggunakan termometer dan refractometer. Untuk penentuan substrat dilihat secara visual terhadap jenis dari substrat tersebut. Hasil penelitian ini ditemukan 9 spesies yang terdiri dari 4 spesies alga merah (Rhodophyceae), dan 5 spesies alga hijau (Ulvophyceae). Morfologi jenis-jenis alga tersebut beragam dengan anatomi yang berbeda berdasarkan potongan melintang dan memanjang dari masing-masing bagian thallus alga. Kepadatan spesies tertinggi yaitu H. edulis sedangkan kepadatan terendah yaitu A. fragilissima, D. versluysii, T. fragilis, dan C. racemosa. Nilai indeks keanekaragaman makroalga pada ketiga transek termasuk dalam kategori sedang, nilai indeks kemerataan jenis dalam keadaan stabil, nilai indeks kekayaan jenis dalam kategori rendah dan nilai indeks dominasi dalam kategori rendah. Kata kunci: Makroalga, Komunitas, Transek, Kuadrat, Bawoho
Optimasi Berat Awal dan Kedalaman pada Vertikultur Caulerpa lentillifera Menggunakan Tali Nilon Monofilamen Ngangi, M.Si, Edwin L. A.; Wantasen, Adnan S.; Longdong, Sammy N. J.; Rembet, Unstain N.W.J.; Mudeng, Joppy D.
Jurnal Ilmiah PLATAX Vol. 14 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v14i1.66721

Abstract

This study aimed to analyze the effects of initial seed weight and cultivation depth on the growth of Caulerpa lentillifera in a vertical culture system using monofilament nylon rope as the planting medium in the coastal waters of Bahoi Village, North Minahasa. A 3×3 factorial design was applied, consisting of three initial weights (50 g, 100 g, and 150 g) and three depths (20 cm, 70 cm, and 120 cm), each with three replications. Observed parameters included absolute growth and specific growth rate (SGR) over a 28-day cultivation period. The results indicated that initial weight significantly affected growth, whereas depth had no significant effect and no interaction was detected between the two factors. The 50 g treatment produced the highest growth performance with an SGR of 1.39 ± 0.08% day⁻¹, which falls within the productivity range of tropical open-sea farming systems. These findings highlight that optimizing seed weight plays a more critical role than shallow depth variation in improving the cultivation efficiency of C. lentillifera under a monofilament nylon-based vertical culture system. Keywords: initial weight; marine aquaculture; C. lentillifera; monofilament nylon; vertical culture system. Abstrak.  Penelitian ini bertujuan menganalisis pengaruh berat awal bibit dan kedalaman pemeliharaan terhadap pertumbuhan Caulerpa lentillifera pada sistem vertikultur menggunakan tali nilon monofilamen sebagai media tanam di perairan Desa Bahoi, Minahasa Utara. Percobaan menggunakan rancangan faktorial 3×3 dengan tiga taraf berat awal (50 g, 100 g, dan 150 g) serta tiga taraf kedalaman (20 cm, 70 cm, dan 120 cm), masing-masing tiga ulangan. Parameter yang diamati meliputi pertumbuhan mutlak dan laju pertumbuhan harian (SGR) selama 28 hari. Hasil analisis menunjukkan bahwa berat awal berpengaruh signifikan terhadap pertumbuhan, sedangkan kedalaman tidak berpengaruh nyata dan tidak terdapat interaksi antara kedua faktor. Perlakuan 50 g menghasilkan pertumbuhan tertinggi dengan nilai SGR 1,39 ± 0,08% per hari. Nilai tersebut berada dalam kisaran produktivitas sistem budidaya laut terbuka tropis. Hasil penelitian ini menegaskan bahwa optimasi ukuran bibit lebih menentukan dibandingkan variasi kedalaman dangkal dalam meningkatkan efisiensi budidaya C. lentillifera pada sistem vertikultur berbasis tali nilon monofilamen. Kata kunci: berat bibit; budidaya laut; C. lentillifera; nilon monofilamen; sistem vertikal
Integration of Agisoft Metashape and eCognition for Mapping Mangrove Ecosystems and Benthic Habitats Using UAV Technology Wantasen, Adnan S.; Pelle, Wilmy E.; Kambey, Alex. D.; Rondonuwu, Ari B.; Tamu'u, Xavier L.; Rembet, Unstain N. W. J.
Jurnal Ilmiah PLATAX Vol. 14 No. 1 (2026): ISSUE JANUARY-JUNE 2026
Publisher : Sam Ratulangi University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jip.v14i1.66778

Abstract

Accurate mapping of coastal ecosystems is essential for marine resource management and biodiversity conservation. This study integrates UAV (Unmanned Aerial Vehicle) technology, Agisoft Metashape photogrammetry, and Object-Based Image Analysis (OBIA) using eCognition to map mangrove ecosystems and benthic habitats in the coastal area of Tiwoho Village, North Minahasa Regency. Data acquisition using DJI drone produced 949 aerial photos at 60.1 meters altitude with 80% overlap covering an area of 0.361 km². Orthophoto with spatial resolution of 1.43 cm/pixel was generated through photogrammetric processing in Agisoft Metashape. Image classification was performed using a two-level hierarchical approach: Level 1 for general zonation (land, shallow water, deep water) using rule-based classification, and Level 2 for detailed benthic habitat identification (primary mangrove, secondary mangrove, sand, seagrass, coral) using Support Vector Machine (SVM) algorithm. Classification results showed Overall Accuracy of 89% and Kappa Index of 94.03% with User's Accuracy ranging from 0.89-0.97 and Producer's Accuracy 0.92-0.99. This integrated workflow proved effective for coastal ecosystem mapping with high accuracy and can be replicated in other regions. Keywords: UAV, photogrammetry, OBIA, Support Vector Machine, benthic habitat, mangrove
Co-Authors . Tamrin Alex D. Kambey Alfret Luasunaung Ali Djamhuri Ali, Fajri Nurul Anneke V. Lohoo Ari B. Rondonuwu Bataragoa, Nego Bawelle, Eunike Calvyn F. A. Sondak, Calvyn F. A. Cyska Lumenta Datunsolang, Frayogi Dei, Katrin Dowena Deiske Adeliene Sumilat, Deiske Adeliene Eddy Mantjoro Edwin D Ngangi Emil Reppie Fajar Vafry Fransine B. Manginsela Gaspar Manu Gybert E Mamuaya Hengky J. Sinjal, Hengky J. Henky Manoppo Henneke Pangkey Hens Onibala Indra R. N. Salindeho Indra Salindeho Ingrid Sembiring Janny D. Kusen Jardie A Andaki, Jardie A Jhonly Solang John L. Tombokan Joice R.T.S.L Rimper Joppy Mudeng Joshian N.W. Schaduw Juliaan Ch. Watung Kambey, Alex. D. Kepel, Rene Ch. Khristin I. F. Kondoy, Khristin I. F. Kindangen, Rezky G. T. L Kondoy, Khiristin Ivone Fisye Kreckhoff, Reni L. Kusen, Diane J. Lalita, Jans Langi, Edwin O. Lawrence J. L. Lumingas Luasunaung, Alfrets Mamonto, Riswanto Mandagi, Stephanus Mandagi, Stephanus V. Manengkey, Hermanto Manu, Lusia Manurung, Nia Dopa Markus T. Lasut Marsaoly, Rafil Menajang, Febry S. I. Menajang, Febry Susana Ivone Mokolensang, Jeffrie F. Moningka, Ivana Trixie Louisa Moningkey, Ruddy D. Namoua, Dilivia J. Nego E. Bataragoa, Nego E. Ngangi, M.Si, Edwin L. A. Nity, Elroi Ockstan J. Kalesaran Pangemanan, Novie P. L. Pangkey, Hanneke Pelle, Wilmy Pelle, Wilmy E. Peter Mangindaan Pitoy, Israel Puasa, Rio N. Rachim, M. Hatta Rauf, Aprianto Rembet, Unstain Rene Charles Kepel, Rene Charles Ridwan Lasabuda Rignolda Djamaluddin Roger R Tabalessy Rondonuwu, Arie B. Rose O. S. E. Mantiri, Rose O. S. E. Salindeho, Indra R. Sambali, Hariyani Sammy N. J. Longdong Sangari, Joudy R. R. Sartje Lantu Silvester B Pratasik Sipriana S. Tumembouw Srinurmahningsi, Sri Stephanus V Mandagi Suria Darwisito, Suria Suzanne L Undap Takou, Putri D. Tamara, Giovanni Matthew A. J. Tamsir, Chika Litawaty Tamu'u, Xavier L. Tangkudung, Maureen J. N. N. Tarimakase, Yulianus Tilaar, Ferdinand F. Toar, Debby Tulenan, Maryand M. Tununu, Riky R. Unstain N. W. J. Rembet, Unstain N. W. J. Unstain N.W.J. Rembet Vivi A Pamikiran Wilhelmina Patty Wilmy E Pelle Winda Mercedes Mingkid Wungkana, Lucky Wungkana, Vike V. Yulianus D Dalengkade Yundari, Yundari